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WS3413H ProductDescription
Features
Internal 650V Power MOSFET
Active PFC for High Power Factor and Low THD
Critical Conduction Mode Operation
System Efficiency up to 95%
Without auxiliary winding
Excellent Line and Load Regulation
±3% LED Output Current Accuracy
Thermal Regulation Function
LED Short/Open Protection
Current Sensing Resistor Open Protection
Auto Fault Recovery
Available in DIP7 Package
Applications
E27 LED Bulb, Spot Light
PAR30, PAR38 Lamp
T8/T10 LED String
Other LED Lighting
Typical Application
Non-isolated Buck APFC Offline LED Driver
Description
The WS3413H is a high precision non-isolated buck
driver with active PFC, specially designed for universal input
offline constant current LED lighting. The driver with on-chip
PFC circuit achieves high power factor and low THD.
Operating in critical conduction mode, the power MOSFET
switching loss is reduced and the inductor is fully utilized.
The WS3413H integrates a 650V power MOSFET. With
few external components, the LED output current can be
precisely controlled.
The WS3413H offers rich protection functions to improve
the system reliability, including LED open circuit protection,
LED short circuit protection, CS resistor open circuit
protection and cycle by cycle current limit. All the protection
functions are auto-recovery. The system reliability is further
improved by the thermal regulation function. The output
current is reduced when the driver is over temperature.
The WS3413H has ultra low start up current and ultra low
operating current.
The WS3413H is available in DIP7 Package.
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WS3413H ProductDescription
Pin Configuration and Marking Information
The WS3413H is available in DIP7 Package,the top marking is shown as below:
WS3413HD7P
A:Product Code
X:Internal Code
BCY:Internal Code For QC
YMX:D/C
Pin Definition
Name
Pin No.
COMP
1
GND
VCC
2
3
FB 4
D 5/6
CS 7
Internal Block Diagram
Description
Loop Compensation Node. This pin connects a capacitor to GND for stabilization of the
control loop, achieving accurate LED current, high Power Factor and low THD.
Ground.
Power Supply Pin. Connect a bypass capacitor from this pin to GND.
Feedback Voltage Input Pin. This pin detects the inductor demagnetization signal and the
output voltage.
Internal HV Power MOSFET Drain.
Current Sense Pin. Connect a resistor to GND to sense the inductor current.
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